Fixed minor typo
Fixed minor typo

Summary:
Closes https://github.com/facebook/proxygen/pull/6
Github Author: Pascal Borreli <pascal@borreli.com>

{sync, type="child", parent="github", parentrepo="facebook/proxygen", parentprnum="6", parentprfbid="822211311176446"}

Test Plan: Imported from GitHub, without a `Test Plan:` line.

Reviewers: viswanath, afrind, cgheorghe, praveenr

Reviewed By: praveenr

chenmoshushi/proxygen,haspatel/proxygen,KublaikhanGeek/proxygen,Werror/proxygen,seem-sky/proxygen,wrmsr/proxygen,wrmsr/proxygen,KublaikhanGeek/proxygen,jgli/proxygen,jgli/proxygen,chjp2046/proxygen,songfj/proxygen,chenmoshushi/proxygen,hiproz/proxygen,Werror/proxygen,KublaikhanGeek/proxygen,fqihangf/proxygen,fqihangf/proxygen,zhiweicai/proxygen,sssemil/proxygen,hiproz/proxygen,seem-sky/proxygen,songfj/proxygen,hongliangzhao/proxygen,seem-sky/proxygen,LilMeyer/proxygen,haspatel/proxygen,sssemil/proxygen,chjp2046/proxygen,Orvid/proxygen,hiproz/proxygen,LilMeyer/proxygen,hnutank163/proxygen,songfj/proxygen,raphaelamorim/proxygen,sssemil/proxygen,wrmsr/proxygen,Orvid/proxygen,Orvid/proxygen,supriyantomaftuh/proxygen,pueril/proxygen,pueril/proxygen,chenmoshushi/proxygen,fqihangf/proxygen,songfj/proxygen,chjp2046/proxygen,supriyantomaftuh/proxygen,hnutank163/proxygen,sssemil/proxygen,zhenglaizhang/proxygen,chjp2046/proxygen,zhiweicai/proxygen,hongliangzhao/proxygen,zhiweicai/proxygen,LilMeyer/proxygen,luxuan/proxygen,Werror/proxygen,supriyantomaftuh/proxygen,zhiweicai/proxygen,zhenglaizhang/proxygen,wrmsr/proxygen,pueril/proxygen,zhenglaizhang/proxygen,pueril/proxygen,jgli/proxygen,Orvid/proxygen,zhenglaizhang/proxygen,haspatel/proxygen,hnutank163/proxygen,hiproz/proxygen,haspatel/proxygen,hongliangzhao/proxygen,raphaelamorim/proxygen,raphaelamorim/proxygen,luxuan/proxygen,fqihangf/proxygen,KublaikhanGeek/proxygen,haspatel/proxygen,seem-sky/proxygen,Werror/proxygen,chenmoshushi/proxygen,jgli/proxygen,raphaelamorim/proxygen,supriyantomaftuh/proxygen,hongliangzhao/proxygen,hnutank163/proxygen,LilMeyer/proxygen,luxuan/proxygen